Burner.



P. M. FURBER.

BURNER.

APPLICATION FILED 13130.31, 1910.

Petented Feb.2,1915.

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nur quieren FREDERICK FURBER, F REVERE, MASSACHUSETTS, ASSIGNOR TO UNTED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

BURNER.

Speccation or Letters Patent.

Patented Feb. 2, 1215.

Application filed December 31, 1910. Serial No. 600,264.

To all whom it may concern: Y

Be it known that I, FREDERICK M. .F.URBER, a citizen of the United States, residing at Revere, in the county of Suffolk and State rotary burnishing tool of thetype'used in finishing the edges of the soles and heels of boots and shoes. Y

ln nishing the sole or heel edges of boots or shoes, the edges are first coated with a finishing material, usually containing wax, and the edges so coated are then polished with a rapidly moving metal tool that usually must be'heated in order to produce a satisfactory finish. Care must be exercised in heating the tool not to allow it to become hot enough to injure the work, while at the same time maintaining it at a suiiiciently high temperature to produce the required finish. As most shoe factories are supplied with illuminating gas, the method of heating such tools commonly practised in shoe factories today consists in directing a luminous flame from a small jet against the tool. The objection to heating tools in this manner is that the ordinary luminous flame deposits soot upon the tool and unless the workman exercises considerable care to keep the soot wiped off, it will be smeared upon the work. For this reason it has been proposed to substitute for the ordinary jet a burner of the Bunsen type because of the well known fact that such a burner produces a clean hot flame. Such attempts, so far as I amaware, have not been successful for the reason that the Bunsen flame cannot be regulated to suit the requirements of the work. When the tool has once been heated up to the required temperature, it takes only a small iiame to maintain it at that temperature and in attempting to use a Bunsen flame, it was found that before it could be turned down to the desired point, the currents of air generated by the rapidly moving tool would blow it out.

The present invention provides a novel burner which, while having the advantages i of the Bunsen burner, is capable also of being regulated to theV desired extent.

An important feature of this invention consists 1n the arrangement by which the air and gas are mixed to produce a flame having the required characteristics.

The embodiment of the invention later to be described in detail comprises a device having a combustion chamber in which the flame can be confined and directed against the part to be heated, and a gas inlet to the chamber, the chamber 'being so located with reference to the shaft and tool to be heated that the air set 1n motion by the shaft and tool is mixed with the gas and produces a flame having the required characteristics.

The nature of the invention will be clearly understood from the following description, reference being made to the accompanying drawings, in which,

Figure 1 is a perspective view of a rotary burnishing or edge setting machine with the present invention applied thereto; and Fig. 2

.is a horizontal sectional view through the rotary shaft and burner casing.

In Fig. 1 of the drawings, 2 indicates a portion of the frame of the edge setting machine. A shaft l is supported in suitable bearings in the frame and itself carries two edge setting tools 6 and 8 of usual form, the former being the forepart tool and the latter the shank tool. A rod 10 supported in the frame has mounted thereon two clamps 11 and 12 that support wax holders for feeding wax to the edge setting irons.

My improved burnercomprises a casing 14 having a hole drilled therethrough Yto receive the rod 10 and carrying a set screw 16 by means of which it may be secured to said rod. The casing is provided with an aperture 18 for the reception of the shaft 4: and this aperture preferably is of larger diameter than the shaft in order to provide a clearance space between it and the shaft. The casing includes twowalls 19 and 2O that extend at substantially right angles to the axis of the shaft and form an annular chamber A encircling the shaft and hereinlafter referred to as the combustion chamber. Projecting laterally from the wall 20 are two annular flanges 21 and 22 both concentric with the aperture 18. These flanges, and a portion of the wall 2O between them, form a second chamber B, and for the purpose of connecting this chamber with the combustion chamber A, a plurality ofholes 24 are drilled through the wall 20. -At one side of the casing a threaded hole'is provided radially of the shaft to receive the 5 threaded end of a nipple 26, which has a plug 28 inserted in its threaded end, through which plug a small gas passage is formed. The nipple 26 is connected through suitable pipes and a valve 30 with a source of gas supply. It should be noted that between the flange 22 and the periphery of the shaft Il there is a chamber or passage C and that the casing 14 is so adjusted with reference to the tool 6 that a small clearing space is left between the ends of the flanges 2l and 22 and the face of the tool.

If the gas is turned on and lightedy in the combustion chamber while the shaft l is stationary, it will burn with a luminous, sooty flame as in any common gas jet. If now the shaft is set in motion, it will be found that the flame will wrap itself around the shaft and will lose most of its luminosity becoming somewhat bluish and almost invisible as in the case of the Bunsen flame. The terms blue flame and nonluminous flame as commonly used in describing the flame of the Bunsen burner are equally applicable in the same senses to the flame produced in applicants burner. With the arrangement shown the flame and heated gases are drawn intothe chambers B and C and thegases pass out through the clearance space between the flanges 21 and 22' and the tool. This action appears to be eX- plainable onv the theory that since the shaft l and tool 6 rotate together and since the tool is of greater diameter than the shaft and therefore has a greater peripheral speed, the air is thrown from its periphery at a greater velocity than is the air around the shaft and hence there is a tendency to create a partial vacuum around the tool. ,Y The air flows through the aperture 18 into the chamber A and from thence into the chambers B and C to equalize the disturbances in pressure caused by these rotating elements. I have found that the flame produced by this arrangement is not only clean and hot, but that it can be regulated to suit every requirement of the work. It can be used successfully with various forms of gaseous and vaporous fuels.

It is obvious that many modifications of the arrangement shown may be made without departing from the principle of the invention.

Having fully described my invention,

. what I claim as new and desire to secure by Letters Patent of the United States is 1. In an apparatus of the class described the combination of a stationary device having a combustion chamber, a stationary gas inlet to said chamber, an air inlet Eto said 1.55 chamber, and driven means operatively of air generated by the moving device serve associated with said device to miX the ail and gas in said chamber sufficiently to proy duce a clean flame.

2. In an apparatus of the class described thecombination of a device having a combustion chamber, a gas inlet to said chamber, anair inlet to the chamber, and a rapidly moving device onto the surface of which said chamber opens, whereby the currents to mix the air and gas in said chamber sufficiently to produce a clean flame.

k3. In'anapparatus of the class described the combination of a stationary device having a combustion chamber, a stationary gas inlet to said chamber, an air inlet to the chamber, and a rotary device positioned in coperative relationship to said chamber to mix the air and gasy therein whereby a clean flame is produced.

el. In an apparatus of the class described the combination with a driven shaft, of a stationary casing having a combustion chamber formed therein and opening onto the surface of the shaft, said chamber being in communication with the atmosphere, and a gas inlet to said chamber independent of said shaft whereby` the motion of the shaft serves to mix the air and gas and thereby produce a clean flame. v

5. Inan apparatus of the class described the combination with a rotary shaft, of a relatively stationary casing encircling the shaft, said casing having a combustion chamber also encircling the shaft, and a gas inlet to said chamber independent of said shaft, said chamber having communication with the atmosphere at opposite sides thereico vof in directions parallel with the shaft.

`6. lIn an apparatus of the class described, the combination with a rotary shaft and a tool mounted thereon to rotate therewith, of a stationary casing positioned beside said tool and encircling said shaft, said casing having a combustion chamber and having openings affording communication between one side of said chamber and said tool and between the opposite side of said chamber and theatmosphere, and a gas inlet to said chamber.

`7. Inan apparatus of the class described the combination with a rotary shaft, of a casing encircling the shaft, said casing providing a clearance space between its walls andthe shaft whereby the shaft may move relatively to the casing and having a com.- bustion chamber in ,communication with said clearance space, and a gas inlet to said chamber. f.

8. Inan apparatus of the class described the combination with a rotary shaft, and a tool mounted thereon, of a casing mounted beside the tool, said casing having an aperture formed ytherethrough to receive the shaft, said aperture being of greater diameter than the shaft whereb)7 a clearance space is provided between it and the casing, said casing having walls extending at substantially right angles to the axis of the shaft and forming a chamber between them, a gas inlet leading into' said chamber radially of the shaft, and two concentric annular flanges encircling the shaft and projecting from one of said qWalls toward the tool, the latter wall having apertures formed therethrough to connect said chamber with the space between said flanges.

9. A device of the .character described comprising a stationary casing having an aperture for the reception of a shaft, said casing having a combustion chamber formed therein in communication with said aperture, and a gas inlet to said chamber.

10. A device of the character described comprising a casing having an aperture formed therethrough for the reception of a rotary shaft, said casing having an annular combustion chamber formed therein opening into said aperture, annular flanges concentric with said aperture projecting laterally from the Wall of the casing and forming a second chamber in communication with the combustion chamber, and a gas inlet to said combustion chamber.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK M. FURBER.

Vitnesses:

JOHN H. MCCREADY, JAMES R. HODDER.

apies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patent, Washington, D. C. 

